python - How to include change_view form with value -

i have book table there 1 filed value contains encrypted title , descriptions of books.

now doing admin function there admin can view or edit user's submitted title , descriptions.

so far drive value field in admin/users/book/5/ using custom modelform , here want show user's submitted value using extra_context know that's not showing in field.

models.py

class book(models.model):     values = models.charfield(max_length=800, null=true, blank=true) 

forms.py

class bookform(forms.modelform):     extra_field = forms.charfield()     def save(self, commit=true):         value = self.cleaned_data.get('value', none)     class meta:         model = book 

admin.py

class bookadmin(admin.modeladmin):         def add_view(self, request, form_url='', extra_context=none):             return super(bookadmin, self).add_view(request)         def change_view(self, request, object_id, form_url='',):             bookinfo = book.objects.get(pk=object_id)             pprint.pprint(bookinfo.values)             extra_context = {}             extra_context['value'] = bookinfo.values             pprint.pprint(extra_context)             return super(bookadmin, self).change_view(request, object_id, form_url, extra_context=extra_context)     form = bookform     fieldsets = (         (none, {             'fields': ('value',),         }),     ) admin.site.register(book, bookadmin) 

here mention changelist_view . tried don't know how include extra_context in book_change_form.html

so word providing initial values custom fields based on instance data

include below code in forms.py work ....

def __init__(self, *args, **kwargs):                 instance = kwargs.get('instance')     if instance:         pprint.pprint(instance.values)         self.base_fields['values'].initial = instance.values     forms.modelform.__init__(self, *args, **kwargs)